<p>
a prime is defined to a number with two and only two distinct factors.</p>
<p>1 is not prime, because its only factor is 1.
0 is not prime, because it has an infinite number of factors (0<em>1, 0</em>2, …)</p>
<p>
a prime is defined to a number with two and only two distinct factors.</p>
<p>1 is not prime, because its only factor is 1.
0 is not prime, because it has an infinite number of factors (0<em>1, 0</em>2, …)</p>